#include <stdio.h>
#include <graphics.h>
/*circle */
int main()
{
    int driver,mode,i;
    float j=1,k=1;
    driver=VGA;mode=VGAHI;
    initgraph(&driver,&mode,"");
    setbkcolor(YELLOW);
    for(i=0;i<=25;i++)
    {
    setcolor(8);
    circle(310,250,k);
    k=k+j;
    j=j+0.3;
    }
}